期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 49, 页码 20725-20734出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c08446
关键词
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资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2020R1A2C2011111]
- Institute for Basic Science [IBSR009-D1, IBS-R009-D2]
- NRF - Korean government [2018M3D1A1058793]
- POSCO, POSTECH-Samsung Semiconductor Research Center program - Samsung Electronics [IO20121508187-01]
- NRF grant - MSIT of the Korean government [NRF-2019R1A2C3003129]
- NRF Global Ph.D. fellowship - Ministry of Education of the Korean government [NRF-2017H1A2A1043322]
- National Research Foundation of Korea [2017H1A2A1043322] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study introduces a novel strategy to design and realize bulk metamaterials with finely tunable hyperbolic responses through a facile two-step process of self-assembly and consolidation. The resulting material system consists of alternating h-BN and graphite/graphene nanolayers, exhibiting significant modulation in hyperbolic resonance modes.
Extraordinary properties of traditional hyperbolic metamaterials, not found in nature, arise from their man-made subwavelength structures causing unique light matter interactions. However, their preparation requiring nanofabrication processes is highly challenging and merely provides nanoscale two-dimensional structures. Stabilizing their bulk arms via scalable procedures has been a sought-goal for broad applications of this technology. Herein, we report a new strategy of designing and realizing bulk metamaterials with finely tunable hyperbolic responses. We develop a facile two-step process: (1) selassembly to obtain heterostructured nanohybrids of building blocks and (2) consolidation to convert nanohybrid powders to dense bulk pellets. Our samples have centimeter-scale dimensions typically, readily further scalable. Importantly, the th'lckness of building blocks and their relative concentration in bulk materials serve as a delicate means of controlling hyperbolic responses. The resulting new bulk heterostructured material system consists of the alternating h-BN and graphiteigraphene nanolayers and exhibits; significant modulation in both type-I and type-II hyperbolic resonance modes. It is the first example of real bulk hyperbolic metamaterials, consequently displaying the capability of tuning their responses along both in-plane and out-of-plane directions of the materials for the first time. It also distinctly interacts with unpolarized and polarized transverse magnetic and electronic beams to give unique hyperbolic responses. Our achievement can be a new platform to create various bulk metamaterials without complicated nanofabrication techniques. Our facile synthesis method using common laboratory techniques can open doors to broad-range researchers for active interdisciplinary studies for this otherwise hardly accessible technology.
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